JPS628920Y2 - - Google Patents
Info
- Publication number
- JPS628920Y2 JPS628920Y2 JP1981005373U JP537381U JPS628920Y2 JP S628920 Y2 JPS628920 Y2 JP S628920Y2 JP 1981005373 U JP1981005373 U JP 1981005373U JP 537381 U JP537381 U JP 537381U JP S628920 Y2 JPS628920 Y2 JP S628920Y2
- Authority
- JP
- Japan
- Prior art keywords
- cross
- porous
- plug
- sectional area
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Description
【考案の詳細な説明】
本考案は、溶融金属中に気体を吹込むポーラス
プラグの構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a porous plug that blows gas into molten metal.
取鍋や、タンデイツシユなどの容器にポーラス
プラグを取付けて気体を吹込むに際し、容器内壁
の損耗とともにポーラスプラグ自体も溶損してい
くが、その損耗量の判断を誤まると湯洩れ事故な
どの重大な問題を惹起する。 When a porous plug is attached to a container such as a ladle or tundish and gas is blown into it, the inner wall of the container wears out and the porous plug itself melts and wears away.If the amount of damage is misjudged, serious problems such as water leaks can occur. cause problems.
この種の判断は、空容器の状態で目視により行
なう。ただし容器内は未だ赤熱状態のため目視判
定は遠距離から行なうことになる。したがつて正
確な判断を行なうには、かなりの熟練を要し、そ
れでも見誤りは避けられないという不便さがあつ
た。 This type of judgment is made visually when the container is empty. However, since the inside of the container is still red-hot, visual judgment must be made from a distance. Therefore, in order to make accurate judgments, considerable skill was required, and even then, mistakes were inevitable, which was inconvenient.
本考案は、これらの損耗量、即ちプラグの取替
え時期を容易に判断できることを目的として実用
的に有用なポーラスプラグの構造を提案するもの
である。 The present invention proposes a practically useful structure of a porous plug for the purpose of easily determining the amount of wear and tear, that is, the time to replace the plug.
以下に図示の例により詳述する。 This will be explained in detail below using illustrated examples.
第１図ａは本考案によるプラグの縦断面を示
し、第１図ｂ，ｃはそれぞれＡ−Ａ，Ｂ−Ｂ矢視
図である。１は鉄皮、２は緻密質耐火物、３が通
気性耐火物（以下ポーラス部という）であり、気
体は吹込方向矢印Ｇの始端側４から終端側５に向
つて流れる。こゝでその始端側４と終端側５の中
間部でポーラス部３の横断面積が、小部分（第１
図ｃ）と大部分（第１図ｂ）の如く段差６をもつ
て変化する。この段差は遠隔距離から目視により
明確に大小の判別が可能なるようにするため両者
の断面積の差が１：２以上となるようにするとよ
いことが経験的に得られた。 FIG. 1a shows a longitudinal section of the plug according to the present invention, and FIGS. 1b and 1c are views taken along the lines A-A and B-B, respectively. 1 is an iron shell, 2 is a dense refractory, and 3 is an air-permeable refractory (hereinafter referred to as a porous part), and gas flows from the starting end 4 to the terminal end 5 of the blowing direction arrow G. Here, the cross-sectional area of the porous portion 3 is a small portion (the first
c) and the majority (Fig. 1b), it changes with a step 6. It has been empirically found that the difference in cross-sectional area between the two steps is preferably 1:2 or more so that the size of this step can be clearly determined visually from a distance.
なお、第１図では気体吹込方向に向つてポーラ
ス部３の断面積変化は小から大へと段差を設けた
が、その他第２図のごとく逆に大から小へとして
もよい。また第３図のごとくポーラス部３の大部
分がプラグ全面にわたる場合も可能である。 In FIG. 1, the cross-sectional area of the porous portion 3 is stepped from small to large in the gas blowing direction, but it may also be changed from large to small as shown in FIG. It is also possible that most of the porous portion 3 covers the entire surface of the plug as shown in FIG.
さらにまた第４図に例示するように、ポーラス
部３を形状の変化によつて組込むこともできる。
即ち面積の大小には特に拘ることなく、例えば正
方形ａ、長方形ｂ、円形ｃなど、これらパターン
の組合せにより、矢印で示す如くａ→ｂ，ｂ→
ａ，ａ→ｃ，ｃ→ａ，ｂ→ｃ，ｃ→ｂなどと自由
に選択すればよい。この場合は形状そのものが模
様として視覚判断可能となることが必要なので組
合せが相似形状とならないように非相似形とすべ
きである。 Furthermore, as illustrated in FIG. 4, the porous portion 3 can be incorporated by changing its shape.
In other words, regardless of the size of the area, for example, square a, rectangle b, circle c, etc., by combining these patterns, a → b, b → as shown by the arrows.
You may freely select a, a→c, c→a, b→c, c→b, etc. In this case, since it is necessary that the shape itself can be visually determined as a pattern, the shapes should be dissimilar shapes so that the combinations do not result in similar shapes.
なお、この段差の設定位置については、溶損に
より終端側５から除々に消失していく際に始端側
４の残存部分ｌがどの程度残つている時点をキヤ
ツチするかによつて適当位置が決定される。 The appropriate position for setting this step is determined by determining the point in time when how much of the remaining portion 1 on the starting end side 4 remains when it gradually disappears from the terminal end side 5 due to melting damage. be done.
次に実施例を示す。 Next, examples will be shown.
取鍋内の溶鋼に底部からアルゴンガスを吹込む
に際し用いられた第１図に示す型のプラグの使用
において、ポーラス部３は段差部分の位置ｌが
150mm、大部分（第１図ｂ）の断面積120cm2、小部
分（第１図ｃ）の断面積36cm2のものを用いた。14
回目の使用後赤熱状態の取鍋内底部を約10Mの距
離から目視により観察したところポーラス部３の
みは冷却速度が早いため黒変しており、前回観察
時の大面積に比べて明らかに小面積に変化してい
ることが確認された。即ち、小面積が現れたこと
は、残存部分ｌが150mmであることを意味するの
で取鍋内壁の補修ならびにポーラスプラグの取替
え時期と判断した。 When using a plug of the type shown in Fig. 1, which was used to blow argon gas into the molten steel in the ladle from the bottom, the porous part 3 is located at the step position l.
150 mm, a cross-sectional area of 120 cm 2 in a large part (FIG. 1 b), and a cross-sectional area of 36 cm 2 in a small part (FIG. 1 c) was used. 14
After the first use, we visually observed the red-hot inner bottom of the ladle from a distance of about 10M. Only the porous part 3 had turned black due to the fast cooling rate, and it was clearly smaller than the large area when observed last time. It was confirmed that the area has changed. That is, the appearance of a small area means that the remaining portion l was 150 mm, so it was determined that it was time to repair the inner wall of the ladle and replace the porous plug.
以上の如く受湯容器内ならびにポーラスプラグ
の損耗程度が簡単に、しかも確実に判定出来るよ
うになり実用的に非常に有用なものである。 As described above, the degree of wear and tear in the hot water receiving container and the porous plug can be determined easily and reliably, which is very useful in practice.
第１図は本考案のポーラスプラグを示す図でａ
図は縦断面図、ｂ図はａ図のＡ−Ａ矢視図、ｃ図
はａ図のＢ−Ｂ矢視図、第２図、および第３図は
本考案の他の例を示す図、第４図はさらに別の本
考案の例で横断面を示す図である。
１……鉄皮、２……緻密質耐火物、３……通気
性耐火物、６……段差。
Figure 1 is a diagram showing the porous plug of the present invention.
The figure is a longitudinal sectional view, the figure b is a view taken along the line A-A in figure A, the figure C is a view taken along line B-B in figure A, and Figures 2 and 3 are views showing other examples of the present invention. , FIG. 4 is a cross-sectional view of still another example of the present invention. 1... Iron skin, 2... Dense refractory, 3... Breathable refractory, 6... Step.
Claims (1)
物を最小限残存させなければならない位置に、通
気性耐火物の断面積比が１：２以上となるか、ま
たはその断面形状が非相似形となる段差を設けた
ことを特徴とする溶融金属中に気体を吹込むポー
ラスプラグ。 The cross-sectional area ratio of the breathable refractory is 1:2 or more, or the cross-sectional shape is dissimilar in the position where the breathable refractory must remain at a minimum between the starting end and the ending end in the gas injection direction. A porous plug that blows gas into molten metal, which is characterized by having a step that gives it a shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981005373U JPS628920Y2 (en) | 1981-01-20 | 1981-01-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981005373U JPS628920Y2 (en) | 1981-01-20 | 1981-01-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57122751U JPS57122751U (en) | 1982-07-30 |
| JPS628920Y2 true JPS628920Y2 (en) | 1987-03-02 |
Family
ID=29803752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981005373U Expired JPS628920Y2 (en) | 1981-01-20 | 1981-01-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS628920Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0343221Y2 (en) * | 1986-11-14 | 1991-09-10 | ||
| JP2009046756A (en) * | 2007-08-23 | 2009-03-05 | Tokyo Yogyo Co Ltd | Gas blowing plug |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4929611U (en) * | 1972-06-16 | 1974-03-14 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931702Y2 (en) * | 1978-12-12 | 1984-09-07 | 黒崎窯業株式会社 | Porous plug for bubbling |
| JPS5919716Y2 (en) * | 1979-06-14 | 1984-06-07 | 黒崎窯業株式会社 | Molded body for gas injection |
-
1981
- 1981-01-20 JP JP1981005373U patent/JPS628920Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4929611U (en) * | 1972-06-16 | 1974-03-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57122751U (en) | 1982-07-30 |
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